Effects of TLp on the ratio of HTase/PON1 activities. HTase and PON 1 activities of HDL were assayed by incubation with the following: 1, no additive; 2, TLp (0.1 μg); 3, TLp (0.5 μg); 4, TLp (1.0 μg); 5, TLp (5.0 μg). HTase activity corresponds to combined enzyme activities of PON1 and PON3. Values are mean ± SEM in individual experiments (n = 6). The data were analyzed by one-way ANOVA followed by Tukey's multiple comparison test. a,bValues with different superscript letters differ significantly among the columns at p < 0.05.